Drying speed

Comfort. In the past, the evaluation of fabric or garment comfort has been a subjective process influenced by such variables as temperature, insulating efficiency, moisture absorption, drying speed, softness, bulk, fabric constmction, and air permeability. Human factors must also be considered. 

PVAc is a thermoplastic polymer due to the manifold variations (homo- or copolymerizate, unmodified or modified, with or without plasticizers) it shows a great variety of processing and bonding propeities. The various formulations differ in viscosity, drying speed, color of the bond line, flexibility or brittleness, hardness or smoothness and other criteria. 

The drying speed increases with increasing specific surface of the product. 

A change of the chamber during secondary drying to less than 0.26 mbar, e. g. to 0.065 mbar, does not change the drying speed. ... 

Relative drying speed Third First Second... 

There are important modifications of alkyds that help in specific applications. Phenolics can be added to improve film hardness and water resistance, but these confer increased yellowing tendencies on the final coating. Silicones impart heat resistance and exterior durability. Styrene increases the drying speed. Methyl methacrylate when added gives faster drying properties and improves the color and durability of the coating. 

No. trials Design matrix Operational matrix Drying speed... 

They are exceptionally useful in primer plastic applications where drying speed, compatibility with various kinds of topcoats, and high adhesive strength is required. Phenoxies are used in automotive and marine primers as well as in heavy-duty maintenance primers. Important use is as a vehicle for coating formulations. 

The first key thing to note about the apphcations is that the vast majority of apphcations involves printing onto stocks which have little or no absorbency and secondly, the printing process is usuahy very fast, both of these factors require the inks to dry quickly. Hence for the ink formulations, we need to take these into account and in addition, the drying speed drives the use of very volatile solvents as weh. 

Super-heated water vapor has been widely used in many industrial processes such as heat-exchange process and drying, and has also been used in the activation process for activated carbon production. Recently, the super-heated water vapor has been utilized in food industry for production of instant food and drying of vegetables and tea leafs. The characteristics of the super-heated water vapor [3] are (1) it can heat the materials without oxidation because it does not contain oxygen and carbon dioxide, (2) drying speed becomes much faster than super-heated air due to heat emission of water molecules, and (3) waste gas is easily recovered by condensing. 

In general, the results from the left branch of the regression tree indicate the importance of the amount of impregnating solution, impregnation time and drying speed (preparation parameters). 

Traditional pressure-sensitive adhesives were solutions of rubber and resin in solvent, and these dominated the market until well after World War II. From that time, as an increasing array of elastomers became available, as the price of solvents soared, and as environmental opposition to the use of solvents increased, water-based and hot-melt types made substantial inroads into the solvent-based market. This trend is likely to continue, although solvent-borne adhesives will probably always retain niches in areas where drying speed or ability to key into specific surfaces will outweigh environmental, handling, or price considerations. 

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